Mc-Gly-Gly-Phe-Gly-PAB-OH TFA(Cat No.:I044170)is a synthetic peptide-based linker commonly used in antibody-drug conjugates (ADCs) and targeted drug delivery systems. It features a methoxycinnamoyl (Mc) cap and a para-aminobenzyl (PAB) self-immolative spacer that enables controlled payload release. The Gly-Gly-Phe-Gly sequence is designed for selective cleavage by tumor-associated proteases such as cathepsin B, triggering drug release at the disease site. The TFA salt form enhances solubility and stability. This linker is valuable for constructing protease-sensitive conjugates in cancer therapy and studying controlled release mechanisms in targeted therapeutic applications.